%I #5 Mar 30 2012 18:56:42
%S 7,49,105,154,203,252,301,343,448,497,546,595,644,693,735,791,840,889,
%T 938,987,1036,1078,1134,1183,1232,1281,1330,1379,1421,1477,1526,1575,
%U 1624,1673,1722,1764,1820,1869,1918,1967,2016
%N Numbers n such that string 1,0 occurs in the base 7 representation of n but not of n-1.
%K nonn,base
%O 1,1
%A _Clark Kimberling_